Heraud, Brian J., author
Routledge & Kegan Paul , 1981
Buku Teks
edited by Robert H. Beck
National Association of Social Workers, 1965
Buku Teks
Gore, M.S., author
Asia Publishing House, 1965
Buku Teks
Cournoyer, Barry R., author
Brooks/Cole Cengage Learning, 2011
Buku Teks
edited by Margaret Yelloly and Mary Henkel
Jessica Kingsley Publishers, 1995
Buku Teks